It is believed that Pompeii was destroyed by a pyroclastic flow. A lahar is a volcanic mudflow or landslide. The 1953 Tangiwai disaster was caused by a lahar, as was the 1985 Armero tragedy in which the town of Armero was buried and an estimated 23,000 people were killed.

A specific type of volcano is the supervolcano. According to the Toba catastrophe theory 70 to 75 thousand years ago a super volcanic event at Lake Toba reduced the human population to 10,000 or even 1,000 breeding pairs creating a bottleneck in human evolution. It also killed three quarters of all plant life in the northern hemisphere. The main danger from a super volcano is the immense cloud of ash which has a disastrous global effect on climate and temperature for many years.
Hydrological disasters
Floods
A flood is an overflow of an expanse of water that submerges land.[1] The EU Floods directive defines a flood as a temporary covering by water of land not normally covered by water.[2] In the sense of "flowing water", the word may also be applied to the inflow of the tide. Flooding may result from the volume of water within a body of water, such as a river or lake, which overflows or breaks levees, with the result that some of the water escapes its usual boundaries.[3] While the size of a lake or other body of water will vary with seasonal changes in precipitation and…

Earthquakes
Natural disasters, such as earthquakes, hurricanes and cyclones, floods, and tornadoes are some of the traumatic experiences that may cause posttraumatic stress disorders. This type of disorders and other disaster related psychological problems are prevalent after natural disasters. As a result it is important to analyse those individuals that develop psychological problems especially to prepare and plan interventions both in the short and long term after disaster (Coşkun, Coşkun…

System remains open to to frequent floods.
Why Disasters Happen
There are four main reasons why disasters happen . These are:-
• Climate Change
Climate change as a term has been envisioned as : “a change in the state of the climate that can be identified (e.g., by using statistical tests) by changes in the mean and/or the variability of its properties, and that persists for an extended period, typically decades or longer. Climate change may be due to natural internal processes or external forcings, or…

For many years natural disasters have affected people all around the world. Things such as tornadoes, volcanic eruptions, earthquakes, avalanches, forest fires and floods can cause big amounts of destruction and cost thousands of lives. These events cause the loss of lives and cost millions of dollars. Now, what are these events and what causes them?
One of these tragic and enormous events are theydro-culture, which is a gust of wind that would destroy anything in its path. The most…

Natural Disasters are unfortunate events that can occur at any moment, anywhere in the world and have a huge effect on the landscape and the society being hit. Natural Disasters can occur due to the many natural causes such as earthquakes, hurricanes, tsunamis, floods, cyclones, landslides or due to some man-made causes such as forest fires or the use of nuclear weapons. Civil Engineering structures such as buildings, bridges, roads, dams, reservoirs, levees and other structures are severely damaged…

IMPACTS OF NATURAL DISASTERS
ABSTRACT:
Disasters of both natural and technological origin have a considerable impact on communities. The effects of disasters in India are significantly reduced by well established counter disaster arrangements at all three levels of government. These arrangements comprise comprehensive plans of prevention, preparedness, response and recovery and in more recent times, of mitigation. The economic effects of disasters can be devastating and widespread. When disasters strike…

are affected by natural disasters. These may be caused by climate change such as drought, flood, and cyclone, the environment such as pollution, deforestation, desertification, pest infestation or combinations of these, or the destroy of ozone layer will contribute to the green house effect. People's homes are wiped out and livelihoods are destroyed. Poverty, population pressures and environmental degradation mean that increasing numbers of people are vulnerable to natural disasters.
In Australia…

Prepare for Any Disaster
6/10/2013
Topics in Contemporary Social Issues
We must have tools and plans in place to make it on our own in case of a disaster happening. Just like having a functioning smoke detector in your house, having emergency supply kits will put tools that one may need at your feet. It is important to be prepared to use what you have on hand to make it on your own for at least three days, maybe even longer.
There are six basic items that one should ensure if any disaster were to occur…

Our Earth has suffered a great deal from reoccurring natural disasters that have repeatedly put a strain on people’s lives. A natural disaster is a sudden event, an accident or a natural havoc, that causes great extents of damage or multiple deaths. Over these past years a numerous amount of these disasters has been seen happening all around the world. Tragedies of towns getting torn apart were reported as well as the occurrence of many deaths, disabilities and shelter damage. People have been losing…

Natural Disasters
This being my senior project I wanted to look at a topic that I found
interesting. Even though I find most topics in the fields interesting, none
catch my attention better than natural disasters. I have always found disasters
intriguing and have wanted to know more about them. The disaster that I found
most interesting were Hurricanes. The thought of those storms with their power
gives me the chills. Ever since I was in the middle of Hurricane Bob when I was
vacationing with…

Natural Disaster and decision that follows
Natural disaster risk can be defined as follows:
The exposure or the chance of loss (of lives, persons injured, property damaged and economic activity disrupted) due to a particular hazard for a given area and reference period. In case of a disaster event, there are several effects, such as humanitarian effects, including the loss of lives and persons injured; ecological effects among other damage to ecosystems; and economic effects, comprising different…